PartsTable
Technical Data Sheet

SK251-21 — Technical Data Sheet

✓ 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 RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1065, end_style: 90 DEGREE PARALLEL, ring_style: STRAIGHT GAP, usage_design: EXTERNAL, inside_diameter: 1.875 INCHES NOMINAL IN, major_thickness: 0.093 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System under NSN 5325-00-741-1354, 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
SK251-21
NSN: 5325-00-741-1354
FSC: 5325
CAGE: 89749 — CLARK MATERIAL HANDLING COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 1065
end_style90 DEGREE PARALLEL
ring_styleSTRAIGHT GAP
usage_designEXTERNAL
inside_diameter1.875 INCHES NOMINAL IN
major_thickness0.093 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
outside_diameter2.250 INCHES NOMINAL IN
special_features0.005 IN. MAX CORNER RADIUS ON ID AND OD ONE SIDE ONLY IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationASTM A576, COMP 1065 ASSN STD SINGLE MATERIAL RESPONSE
NSN5325-00-741-1354
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: SK251-21 · 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
•
MATERIAL: STEEL COMP 1065
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A576, COMP 1065 ASSN STD SINGLE MATERIAL RESPONSE
•
OUTSIDE DIAMETER: 2.250 INCHES NOMINAL IN
•
USAGE DESIGN: EXTERNAL
•
MATERIAL HARDNESS RATING: 43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
•
INSIDE DIAMETER: 1.875 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS
SPECIAL FEATURES0.005 IN. MAX CORNER RADIUS ON ID AND OD ONE SIDE ONLY IN
MATERIALSTEEL COMP 1065
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A576, COMP 1065 ASSN STD SINGLE MATERIAL RESPONSE
OUTSIDE DIAMETER2.250 INCHES NOMINAL IN
USAGE DESIGNEXTERNAL
MATERIAL HARDNESS RATING43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
INSIDE DIAMETER1.875 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
RING STYLESTRAIGHT GAP
END STYLE90 DEGREE PARALLEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
1911-0InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
266-8397-020InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
W26-191950-00InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
19110-1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
G350301S1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
308MFInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy SK251-21?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is SK251-21?
SK251-21 is a RING,RETAINING.
What parts can replace SK251-21?
There are 26 known substitutes for SK251-21: 1911-0, 266-8397-020, W26-191950-00 and 23 more. Substitute compatibility should be verified for your specific system.
Is SK251-21 still available?
SK251-21 is currently cancelled.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — SK251-21