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A1131C — FILTER ELEMENT,INTAKE AIR CLEANE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

A1131C: FILTER ELEMENT,INTAKE AIR CLEANE.

FILTER ELEMENT,INTAKE AIR CLEANE. Key specifications include overall_width: 6.188 INCHES NOMINAL IN, body_thickness: 1.188 INCHES NOMINAL IN, style_designator: RECTANGULAR (INCL SQUARE), body_overall_length: 11.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-057-0318, 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
A1131C
NSN: 5305-00-057-0318
NIINs: 000570318, 013327690
FSC: 5305 — Screws
CAGE: K7766 — BSI STANDARDS LIMITED (GBR)
SPECIFICATIONS
overall_width6.188 INCHES NOMINAL IN
body_thickness1.188 INCHES NOMINAL IN
style_designatorRECTANGULAR (INCL SQUARE)
body_overall_length11.250 INCHES NOMINAL IN
NSN5305-00-057-0318
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: A1131C · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
HEAD HEIGHT: 0.088 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT: CADMIUM
•
FASTENER LENGTH: 0.550 INCHES MINIMUM AND 0.590 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.427 INCHES MINIMUM AND 0.467 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.164 INCHES IN
•
HEAD STYLE: BUTTON
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.088 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTCADMIUM
FASTENER LENGTH0.550 INCHES MINIMUM AND 0.590 INCHES MAXIMUM IN
THREAD LENGTH0.427 INCHES MINIMUM AND 0.467 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.164 INCHES IN
HEAD STYLEBUTTON
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL
MINIMUM TENSILE STRENGTH110000 POUNDS PER SQUARE INCH LBS
INTERNAL DRIVE STYLESLOT
SUBSTITUTES & CROSS-REFERENCES 1
FF-S-92B TY 1 ST 7SSame 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 A1131C?
A1131C is a FILTER ELEMENT,INTAKE AIR CLEANE.
What parts can replace A1131C?
There is 1 known substitute for A1131C: FF-S-92B TY 1 ST 7S. Substitute compatibility should be verified for your specific system.
What is the NSN for A1131C?
A1131C is cataloged in the U.S. Government catalog under NSN 5305-00-057-0318. 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.