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Technical Data Sheet
PartsTable / COMPONENT / C976-1
C976-1 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The SCREW ASSEMBLY,PANEL is a the manufacturer industrial component. Key specifications include head_style: PAN, head_height: 0.077 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.250 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN, thread_length: 0.188 INCHES MINIMUM AND 0.218 INCHES MAXIMUM IN, fastener_length: 0.271 INCHES MINIMUM AND 0.301 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-349-1244, 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
C976-1
NSN: 5330-00-349-1244
FSC: 5330
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
head_stylePAN
head_height0.077 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.250 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN
thread_length0.188 INCHES MINIMUM AND 0.218 INCHES MAXIMUM IN
fastener_length0.271 INCHES MINIMUM AND 0.301 INCHES MAXIMUM IN
hardness_rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM PRIMARY WASHER
special_featuresFINISH COLOR BLACK
thread_directionRIGHT-HAND
surface_treatmentOXIDE OVERALL
nominal_thread_diameter0.138 INCHES IN
minimum_tensile_strength140000 POUNDS PER SQUARE INCH LBS
NSN5330-00-349-1244
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: C976-1 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
D-712LInterchangeable
interchangeable cross-reference
interchangeable
27-307BInterchangeable
interchangeable cross-reference
interchangeable
7252Interchangeable
interchangeable cross-reference
interchangeable
52261Interchangeable
interchangeable cross-reference
interchangeable
080739-1Interchangeable
interchangeable cross-reference
interchangeable
5920PL0981800Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C976-1?
C976-1 is a SCREW ASSEMBLY,PANEL.
What parts can replace C976-1?
There are 8 known substitutes for C976-1: D-712L, 27-307B, 7252 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C976-1?
C976-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-349-1244. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026