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4R420 — FACE,HAMMER,INSERTED

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

4R420: FACE,HAMMER,INSERTED.

The FACE,HAMMER,INSERTED is a the manufacturer industrial component. Key specifications include diameter: 2.000 INCHES NOMINAL IN, material: PLASTIC, unit_type: SCREW-IN, striking_face_shape: FLAT, hardness_designation: SUPER SOFT. This part is cataloged in the U.S.

Government catalog under NSN 5120-00-555-2078, 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
4R420
NSN: 5120-00-555-2078
FSC: 5120 — Hand Tools, Nonedged, Nonpowered
CAGE: 25795 — W.W. GRAINGER, INC. DIV GOVERNMENT SALES DIVISION (USA)
SPECIFICATIONS
diameter2.000 INCHES NOMINAL IN
materialPLASTIC
unit_typeSCREW-IN
striking_face_shapeFLAT
hardness_designationSUPER SOFT
NSN5120-00-555-2078
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available FACE,HAMMER,INSERTED TITLE COMPONENT PN 4R420 MFR FACE,HAMMER,INSERTED
KEY FEATURES
•
HARDNESS DESIGNATION: SUPER SOFT
•
DIAMETER: 2.000 INCHES NOMINAL IN
•
STRIKING FACE SHAPE: FLAT
•
UNIT TYPE: SCREW-IN
•
MATERIAL: PLASTIC
TECHNICAL CHARACTERISTICS
HARDNESS DESIGNATIONSUPER SOFT
DIAMETER2.000 INCHES NOMINAL IN
STRIKING FACE SHAPEFLAT
UNIT TYPESCREW-IN
MATERIALPLASTIC
SUBSTITUTES & CROSS-REFERENCES 5
20SSReference document
Same NSN cross-reference
Reference document — Design control — primary reference
69-161Reference document
Same NSN cross-reference
Reference document — Secondary reference
GGG-H-33 TY1CL3STDReference document
Same NSN cross-reference
Reference document — Secondary reference
SF20SSReference document
Same NSN cross-reference
Reference document — Secondary reference
GGG-H-33Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4R420?
4R420 is a FACE,HAMMER,INSERTED.
What parts can replace 4R420?
There are 5 known substitutes for 4R420: 20SS, 69-161, GGG-H-33 TY1CL3STD and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4R420?
4R420 is cataloged in the U.S. Government catalog under NSN 5120-00-555-2078. 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.