Introducing hex Allen bolts, also called cap bolts, which are capable of providing high tightening torque.

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Hex Allen Bolts (Caps)

Because hex Allen bolts are generally not used together with nuts, "screw" is the more appropriate term for this type of product.

However, the name "hex Allen bolt" (or cap bolt) has become prevalent.

Applicable strength classifications: 8.8 - 10.9 - 12.9.
May be tightened with a hex Allen key wrench. (Up to 1,000mm length to bottom of head)

Features

Makes compact equipment design possible.
Makes improved aesthetic design possible.
Improves functionality and workability in confined spaces.
High tightening performance to improve reliability against loosening.

*Click to enlarge

Nominal thread size (d)	M30	Allowed tolerance	M33	Allowed tolerance	M36	Allowed tolerance	M42	Allowed tolerance	M48	Allowed tolerance
P	3.5	-	3.5	-	4.0	-	4.5	-	5.0	-
b (reference)	72		78		84		96		108
dk	45	±0.39	50	±0.46	54	±0.46	63	±0.46	72	±0.46
da (Max)	33.4	-	36.6	-	39.4	-	45.6	-	52.6	-
ds	30	+0 -0.33	33	+0 -0.39	36	+0 -0.39	42	+0 -0.39	48	+0 -0.39
e (Min)	25.15	-	27.43	-	30.85	-	36.57	-	41.13	-
k	30	+0 -0.52	33	+0 -0.62	36	+0 -0.62	42	+0 -0.62	48	+0 -0.62
r (Min)	1	-	1	-	1	-	1.2	-	1.6	-
s	22	+0.07 +0.275	24	+0.07 +0.27	27	+0.07 +0.27	32	+0.08 +0.33	36	+0.08 +0.33
t (Min)	15.5	-	16.5	-	19	-	24	-	28	-
w	13.1	-	15	-	15.3	-	16.3	-	17.5	-

L - common tolerance
45～50	±0.5	190～250	±0.95
55～80	±0.6	260～300	±1.05
90～120	±0.7
130～180	±0.8

Note: Full length threading used for	M30 less than 100mm
	M33 less than 105mm
	M36 less than 110mm
	M42 less than 130mm
	M48 less than 150mm

Large Machinery/Civil Engineering/Shipbuilding-related Products

| Hex Bolts (4.6 - 12.9) | Hex Allen Bolts (Caps) | Stainless Bolts |

Other uses for track spikes, trapezoidal screws, etc.

Why not use for decorative purposes? Track spikes and screws can be used as commemorative gifts.
Track spikes, also called "dog spikes" due to their resemblance to a dog's head, can be used in variety of applications. Try using them as decorations for outside walls or as hanging hooks.

Please do not hesitate to contact us to request samples or documents.

In addition to standard bolts, we at Teikoku Seibyo are ready to serve your diverse needs, from unusual form bolts to special order steel bolts.
Teikoku Seibyo Co., Ltd. 3-2- 21, Kaigan-dori, Minato-ku, Osaka-City, Osaka 552-0022
URL http://www.teikoku-seibyo.com E-mail teibyou@nifty.com