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Palnut® On-Sert Fasteners

Palnut® On-Sert Fasteners

The Dimensions of the following parts are envelope dimensions only. For complete design information, please request a blueprint from your Tinnerman Palnut representative or the Tinnerman Palnut Engineering Department.

		On-Sert Fasteners				Plastic Boss
Part Number	Thread Size No. (See Note 1)	Design	Height H (In.)	Dia. D In.	Weight Lbs./M Pieces	O.D. (In.)	I.D. (In.) (See Note 2)	Min. Dia. of Ctsk. C (In.)	Applicator Tool Part No. (See Note 3)
NR 440004	4-40	1	.220	.284	1.0	.247-.253	.096-.100	.180	WW 100250
NR 620005	6-20 & 6-18	1	.230	.354	1.5	.309-.315	.116-.120	.250	WW 100312
NR 632005	6-32	1	.230	.354	1.4	.309-.315	.116-.120	.250	WW 100312
NR 818005	8-18 & 8-15	1	.230	.354	1.4	.309-.315	.140-.144	.290	WW 100312
NR 818045	8-18 & 8-15	1	.230	.328	1.3	.279-.285	.140-.144	.220	WW 100312
NR 818008	8-18 & 8-15	1	.260	.544	3.5	.497-.503	.140-.144	.290	WW 100500
NR 818085	8-18 & 8-15	1	.254	.556	3.0	.509-.515	.140-.144	.290	WW 160500
NR 818006	8-18 & 8-15	1	.220	.422	1.9	.372-.378	.140-.144	.290	WW 100375
NI 818006	8-18 & 8-15	2	.280	.422	1.9	.372-.378	.185-.250	NONE	WDK 170438
NR 832006	8-32	1	.220	.422	1.9	.372-.378	.140-.144	.290	WW 100375
NI 832006	8-32	2	.270	.422	1.9	.372-.378	.185-.250	NONE	WDK 170438
NR 101606	10-12 & 10-16	1	.230	.422	1.8	.372-.378	.160-.164	.290	WW 100375

			High Impact Styrene		Polycarbonate		ABS		Acetal
Part Number	Screw Size No. (driven to 5/16" penetration)	Hole Size (I.D. In.)	Max Torque (In. Lbs.)	Avg. Pull-Out (Lbs.)	Max Torque (In. Lbs.)	Avg. Pull-Out (Lbs.)	Max Torque (In. lbs.)	Avg. Pull-Out (Lbs.)	Max Torque (In. Lbs.)	Avg. Pull-Out (Lbs.)
None	8-18	.142	10	150	10	162	15	375	25	530
NR 818006	8-18	Inter. Fit	27	280	30	370	33	438	53	680
None	8-18	.250	Assembly Not Possible
NR 818006	8-18	Clear Fit	15	118	20	129	15	68	15	107

NOTE 1.The thread form of Parts NR440004, NR832006 and NI832006 is designed to accept either a machine screw or Type F tapping screw of the thread size designated. Each of the other parts accommodates a tapping screw of the size indicated.

NOTE 2.For maximum screw pull-out resistance with Design 1 parts, the boss I.D. should be as specified above to provide an interference fit with the screw. On-sert fasteners can also be used where the screw clears the I.D. of the boss, but this arrangement reduces resistance to screw pull-out.

NOTE 3.Design 2 parts should always be installed with teh appropriate applicator tool which is designed to protect the projecting thread form from deformation by pressure or a direct blow. Although Design 1 parts may be installed by tapping directly on the top of the fasteners with a hammer, the magnetized applicator tool facilitates handling and positioning.

These distinctive fasteners with a single helical thread slip over hollow plastic bosses and prevent splitting when screws are driven. They also prevent cross-threading and resist screw pull-out. Yet screws may be removed without harming the fasteners or the boss. On-sert fasteners thus perform the same function as solid inserts but cost only about one-fifth as much. One type is used when screws enter the top of a boss while another type is used when screws enter the bottom of the boss.

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