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420623 — WASHER,KEY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

420623: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include style_designator: 90 DEGREE LOCKING KEY, external_prebent_key_angle: 15.0 DEGREES NOMINAL, distance_from_centerline_to_inside_of_prebent_key: 0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-042-0623, 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
420623
NSN: 5305-00-042-0623
NIINs: 000420623, 011598915
FSC: 5305 — Screws
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
style_designator90 DEGREE LOCKING KEY
external_prebent_key_angle15.0 DEGREES NOMINAL
distance_from_centerline_to_inside_of_prebent_key0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN
NSN5305-00-042-0623
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 420623 · 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
•
FASTENER LENGTH: 0.750 INCHES NOMINAL IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OR 66 FED STD SINGLE MATERIAL RESPONSE
•
THREAD LENGTH: 0.597 INCHES MINIMUM IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK
•
THREAD DIRECTION: RIGHT-HAND
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 2S STYLE
•
SCREW MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
FASTENER LENGTH0.750 INCHES NOMINAL IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OR 66 FED STD SINGLE MATERIAL RESPONSE
THREAD LENGTH0.597 INCHES MINIMUM IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 2S STYLE
SCREW MATERIALSTEEL
MINIMUM TENSILE STRENGTH60000 POUNDS PER SQUARE INCH LBS
INTERNAL DRIVE STYLESLOT
SUBSTITUTES & CROSS-REFERENCES 2
FFS92TYPE1STYLE2SReference document
Same NSN cross-reference
Reference document — Identification reference
MS35238-91Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 420623?
420623 is a WASHER,KEY.
What parts can replace 420623?
There are 2 known substitutes for 420623: FFS92TYPE1STYLE2S, MS35238-91. Substitute compatibility should be verified for your specific system.
What is the NSN for 420623?
420623 is cataloged in the U.S. Government catalog under NSN 5305-00-042-0623. 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.