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540-080 — RESPIRATOR,AIR FILTERING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

540-080: RESPIRATOR,AIR FILTERING.

The RESPIRATOR,AIR FILTERING is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYCARBONATE VISUAL PROVISION, mask_type: FULL FACEPIECE, strap_type: SINGLE, head_harness: INCLUDED, adjustability: ADJUSTABLE, exhaust_valve: INCLUDED. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-331-1702, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
540-080
NSN: 5315-01-331-1702
NIINs: 013311702, 013951664
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 58366 — KIRBY MORGAN DIVE SYSTEMS INC (USA)
SPECIFICATIONS
materialPLASTIC POLYCARBONATE VISUAL PROVISION
mask_typeFULL FACEPIECE
strap_typeSINGLE
head_harnessINCLUDED
adjustabilityADJUSTABLE
exhaust_valveINCLUDED
material_typeELASTIC
special_featuresBELT-MOUNTED PAPR, STANDARD SIZE, BLACK, 5-STRAP, WITH ALARM, NIOSH/MSHA, MEETS ANSI/UL 913 STANDARD FOR INTRINSICALLY SAFE APPARATUS, SPEAKING DIAPHRAGM
mask_filter_quantity3
filter_replaceabilityREPLACEABLE
visual_provision_typeWINDOW
end_item_identificationMK21 MOD1 DIVING HELMET
NSN5315-01-331-1702
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 540-080 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
TECHNICAL CHARACTERISTICS
END ITEM IDENTIFICATIONMK21 MOD1 DIVING HELMET
SUBSTITUTES & CROSS-REFERENCES 1
592-6318254Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 540-080?
540-080 is a RESPIRATOR,AIR FILTERING.
What parts can replace 540-080?
There is 1 known substitute for 540-080: 592-6318254. Substitute compatibility should be verified for your specific system.
What is the NSN for 540-080?
540-080 is cataloged in the U.S. Government catalog under NSN 5315-01-331-1702. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.