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Technical Data Sheet
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491261 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

491261: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5305-01-047-7653, 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
491261
NSN: 5305-01-047-7653
NIINs: 010477653, 015739287
FSC: 5305 — Screws
CAGE: 05168 — ELSAG BAILEY INC (USA)
SPECIFICATIONS
special_featuresCUSTOM FITTED FOR MAXIMUM PROTECTION; FLIP OPEN WITH INNER O-RING FOR AIRTIGHT SEAL TO KEEP OUT DUST AND MOISTURE; SILENT ACTION HINGE; 1.840" OBJECTIVE SIZE 27; BLACK
NSN5305-01-047-7653
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 491261 · 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
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HEAD HEIGHT: 0.029 INCHES MINIMUM AND 0.038 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.105 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.080 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
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NOMINAL THREAD DIAMETER: 0.060 INCHES IN
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HEAD STYLE: FILLISTER
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THREAD DIRECTION: RIGHT-HAND
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SCREW MATERIAL: STEEL
•
INTERNAL DRIVE STYLE: SLOT
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.029 INCHES MINIMUM AND 0.038 INCHES MAXIMUM IN
FASTENER LENGTH0.105 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
THREAD LENGTH0.080 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.060 INCHES IN
HEAD STYLEFILLISTER
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL
INTERNAL DRIVE STYLESLOT
THREAD CLASS2A A
THREAD QUANTITY PER INCH80
SUBSTITUTES & CROSS-REFERENCES 2
P41-45ITEM39Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
49126A1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 491261?
491261 is a SCREW,MACHINE.
What parts can replace 491261?
There are 2 known substitutes for 491261: P41-45ITEM39, 49126A1. Substitute compatibility should be verified for your specific system.
What is the NSN for 491261?
491261 is cataloged in the U.S. Government catalog under NSN 5305-01-047-7653. This indicates validated use in U.S. government and defense supply chains.
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