PartsTable
Technical Data Sheet
57-1158 ✓ Verified by PartsTable
· BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, thickness: 0.031 INCHES NOMINAL IN, hole_diameter: 0.703 INCHES NOMINAL IN, hardness_rating: 55.0 DUROMETER MINIMUM AND 60.0 DUROMETER MAXIMUM, overall_diameter: 0.812 INCHES NOMINAL IN, peripheral_shape_style: ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-057-1158, 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
57-1158
NSN: 5305-00-057-1158
FSC: 5305
CAGE: 00000
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
thickness0.031 INCHES NOMINAL IN
hole_diameter0.703 INCHES NOMINAL IN
hardness_rating55.0 DUROMETER MINIMUM AND 60.0 DUROMETER MAXIMUM
overall_diameter0.812 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationMIL-R-6855,CL 2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5305-00-057-1158
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 57-1158 · 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
THREAD DIRECTION: RIGHT-HAND
HEAD HEIGHT: 0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS: 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
HOLE CONFIGURATION STYLE: HEXAGON FLATS
HARDNESS RATING: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION: SAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL: STEEL OVERALL
MINIMUM YIELD STRENGTH: 120000 POUNDS PER SQUARE INCH LBS
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
HEAD HEIGHT0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
HOLE CONFIGURATION STYLEHEXAGON FLATS
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
MINIMUM YIELD STRENGTH120000 POUNDS PER SQUARE INCH LBS
THREAD SERIES DESIGNATORUNF
FASTENER LENGTH1.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
57-1158Interchangeable
interchangeable cross-reference
interchangeable
34-270Interchangeable
interchangeable cross-reference
interchangeable
FFS85TYPE2STYLE10PInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 57-1158?
57-1158 is a WASHER,FLAT.
What parts can replace 57-1158?
There are 3 known substitutes for 57-1158: 57-1158, 34-270, FFS85TYPE2STYLE10P. Substitute compatibility should be verified for your specific system.
What is the NSN for 57-1158?
57-1158 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-057-1158. This indicates validated use in U.S. government and defense supply chains.
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