What AQL suits a submachine gun storage case standard?

Answer: 1.0 for majors and 2.5 for minors is the usual pair for structural mouldings. Tighter pushes sorting cost into the price; looser lets flash through.

Why fix lighting and distance before appearance inspection?

Answer: Without a shared baseline there is no verdict. 600 mm at 800 lux makes a scratch visible under identical conditions.

Must type tests run on every lot?

Answer: No. Design freeze, material change and major mould repair trigger them, with quarterly checks between.

How are major and minor defects separated?

Answer: By consequence, not by area. Cracks, through-holes, sealing-face nicks and short shots affect sealing or closing; flow lines stay minor.

How many wall points should be measured on a submachine gun storage case?

Answer: Eight per case, four midpoints and four corners. Corners thin out first, so midpoint-only checks miss a short shot running round the tool.

Submachine Gun Storage Case Acceptance: Tests and Verdicts

Quick answer: Acceptance rests on four groups: appearance, dimensions, performance and marking. Each needs its own verdict rule, sample size and disposition path in the contract.

Four Inspection Groups for a Submachine Gun Storage Case
How Appearance and Size Are Checked
Type Tests and Their Verdicts
Sampling Plan and Defect Classes
Reject Lots, Sorting and Re-inspection
FAQ

1. Four Inspection Groups for a Submachine Gun Storage Case

Acceptance for a submachine gun storage case runs on four groups: appearance, dimensions, performance, marking. Each carries its own rule, and blurring them lets a cosmetic flaw and a structural one share one yield figure.

One yield figure hides the difference. A short-shot latch hook and a light flow line both count as a single defect, so a sealing failure gets averaged out by cosmetics.

Group	Method	Verdict basis
Appearance	Visual, 600 mm, 800 lux	Defect class, major is zero tolerance
Dimensions	First article plus shift sampling	Drawing tolerance band
Performance	Type test on triggers and quarterly	Pass or fail, no scoring
Marking and packing	Unit check plus carton sampling	Height, lot code, barcode

2. How Appearance and Size Are Checked

Viewing conditions for a submachine gun storage case come first: 600 mm distance, 800 lux, D65 light, sample and colour chip on one plane, or the same scratch earns two verdicts.

Four defects on a submachine gun storage case are always major: cracks, through-holes, sealing-face nicks, short shots on the latch hook. Flash holds minor to 0.3 mm and turns major past 0.8 mm, where it cuts hands.

First article measures 12 key dimensions on 3 cases; production checks 6 assembly dimensions on 5 cases per shift. Wall thickness goes on an ultrasonic gauge at 8 points, four midpoints and four corners, failing below 90 percent of drawing.

Item	Instrument	Verdict
Cavity length, width, depth	Caliper or go/no-go gauge	Inside the tolerance band
Wall thickness	Ultrasonic gauge, 8 points	At least 90 percent of drawing
Closing gap	Feeler gauge	0.8 mm or less
Latch holding force	Force gauge	160 N or more

3. Type Tests and Their Verdicts

Type tests on a submachine gun storage case run on three triggers: design freeze, a change of material, a major mould repair. Production repeats them quarterly on 3 cases drawn from a normal lot.

Drop testing of a submachine gun storage case runs at 1.5 m across six faces, three edges and one corner, 10 drops with the case loaded. Verdicts: no shell cracks, both latches openable with one hand, seal cord still in its groove.

Immersion holds the case at 1 m for 30 minutes with absorbent paper inside; no watermark allowed. Latch life runs 15,000 cycles with 15 percent force loss, and hardware takes 72 hours of neutral salt spray to rating 9 under GB/T 6461.

Test	Condition	Verdict
Drop	1.5 m, 6 faces, 3 edges, 1 corner	No cracks, one-hand opening
Immersion	1 m, 30 minutes	No watermark on paper
Latch life	15,000 cycles	Force loss within 15 percent
Salt spray	72 hours neutral	Rating 9 or better

4. Sampling Plan and Defect Classes

Sampling of a submachine gun storage case follows GB/T 2828.1, level II, normal single: majors at AQL 1.0, minors at 2.5. A lot of 501 to 1200 maps to code J with 80 samples, accept 2 reject 3 on majors, accept 5 reject 6 on minors.

Class must be written apart from yield. Three minor defects in 80 samples read as 96 percent good and still reject the lot at AQL 2.5, while one short-shot hook is 1.25 percent and stops the shipment.

5. Reject Lots, Sorting and Re-inspection

A rejected submachine gun storage case lot has three exits: sorting, downgrading, return. Majors require 100 percent sorting, minors can be downgraded with separate marking, and performance failures go back without discussion.

Re-inspection is not a fresh draw. A sorted lot returns under tightened inspection at the same sample size with the acceptance number down by one. Two consecutive rejects stop the line; five consecutive accepts restore normal inspection.

Records need sample number, inspector and time of verdict. Miss one and traceability breaks inside six months, pulling every lot from the same tool into a recall.

Conclusion

A standard earns its keep when every clause decides something: conditions for appearance, instruments for dimensions, fixed verdicts for performance, sample sizes for lots, exits for rejects. Tie the five together and a submachine gun storage case standard can be audited by anyone holding the sheet.

This article discusses only the container (case body) side of specifications and design intent, and does not cover any handling, loading or use of the contents.