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91770A657 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

91770A657: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: TRUSS, head_height: 0.215 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.823 INCHES NOMINAL IN, thread_length: 2.000 INCHES NOMINAL IN, screw_material: STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 303. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-526-6323, 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
91770A657
NSN: 5305-01-526-6323
FSC: 5305 — Screws
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
head_styleTRUSS
head_height0.215 INCHES NOMINAL IN
thread_class2A A
head_diameter0.823 INCHES NOMINAL IN
thread_length2.000 INCHES NOMINAL IN
screw_materialSTEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 303
fastener_length2.000 INCHES NOMINAL IN
hardness_rating85.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.375 INCHES IN
minimum_tensile_strength80000 POUNDS PER SQUARE INCH LBS
NSN5305-01-526-6323
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91770A657 · 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: 0.215 INCHES NOMINAL IN
•
FASTENER LENGTH: 2.000 INCHES NOMINAL IN
•
THREAD LENGTH: 2.000 INCHES NOMINAL IN
•
HARDNESS RATING: 85.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
HEAD STYLE: TRUSS
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 303
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.215 INCHES NOMINAL IN
FASTENER LENGTH2.000 INCHES NOMINAL IN
THREAD LENGTH2.000 INCHES NOMINAL IN
HARDNESS RATING85.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM
NOMINAL THREAD DIAMETER0.375 INCHES IN
HEAD STYLETRUSS
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 303
MINIMUM TENSILE STRENGTH80000 POUNDS PER SQUARE INCH LBS
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 91770A657?
91770A657 is a SCREW,MACHINE.
What is the NSN for 91770A657?
91770A657 is cataloged in the U.S. Government catalog under NSN 5305-01-526-6323. This indicates validated use in U.S. government and defense supply chains.
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